Toa TS-770 Series - Manual (Page 23)

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Step 7. Adjust the sound volume of the Chairman and Delegate units.
Press the Talk key on both the Delegate unit in the number set in Step 4 and the Chairman unit to
turn on their microphone. Speaking into the microphone, adjust the volume to an appropriate level
using the Central unit's Line Volume control.
TS-770
TS-771 or TS-772
Line volume control
Indicator: Extinguishes
Indicator: Lights
Indicator: Lights
CENTRAL UNIT TS-770
Step 8. Confirm that no acoustic feedback is generated from any microphone to be used.
If acoustic feedback occurs, widen the distance between conference units or turn down the line
volume in order to prevent feedback.
Use an equalizer to ensure that no acoustic feedback is caused even if the sound volume is
increased. Connect the equalizer's input terminal to the Central unit's Equalizer Insertion Output
terminal and the equalizer's output terminal to the Central unit's Equalizer Insertion Input terminal,
then set the Central unit's Equalizer Insertion switch to ON. This allows all audio signals to be
controlled by the equalizer.
TS-770
Equalizer
Equalizer insertion switch
Out In
10.3.2. Setting functions and adjusting Chairman and Delegate units sound output volume
Step 6. Set the number of simultaneously operable Delegate units using the Speaker Restriction switch on
the front panel of the Central unit.
For details, refer to p. 16.
TS-770 Central unit
Speaker restriction switch
(Factory preset: 6) CENTRAL UNIT TS-770